CN104702388B

CN104702388B - Multiplexing demodulation reference signal in wireless communications

Info

Publication number: CN104702388B
Application number: CN201510043297.4A
Authority: CN
Inventors: X·罗; W·陈; 张晓霞; P·加尔; J·蒙托霍
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2010-01-11
Filing date: 2011-01-11
Publication date: 2019-01-08
Anticipated expiration: 2031-01-11
Also published as: JP2015008485A; CN102714588B; JP2013516943A; MY165241A; RU2539969C2; US20120014318A1; KR101489774B1; ES2729483T3; WO2011085402A2; CN102714588A; BR112012016650A2; US9698954B2; EP2524467A2; MY191143A; US20160156445A1; CN104702388A; JP5869071B2; HK1211154A1; US9258160B2; CA2885053A1

Abstract

Provided for determining cyclic shift (CS) values and/or orthogonal cover codes (OCCs) for multiple demodulation reference signals (DM‑RS) transmitted on multiple layers in multiple-input multiple-output (MIMO) communications ) method and device. The CS index may be received from the base station in downlink control information (DCI) or similar signaling. The CS values for the plurality of DM-RSs may be determined based at least in part on the CS index. Furthermore, the OCC may be explicitly signaled or similarly determined from the CS index and/or the configured CS value received from higher layers. Furthermore, controlling the assignment of CS indices and/or OCCs can help provide orthogonality for communications from paired devices in multi-user MIMO.

Description

Multiplexing demodulation reference signal in wireless communications

Related application

The application be on 01 11st, 2011 the applying date, application No. is 201180005749.X, entitled " in channel radio The divisional application of the Chinese patent application of multiplexing demodulation reference signal in letter ".

Cross reference

Patent application claims are in " DEMODULATION REFERENCE submitting, entitled on January 11st, 2010 The provisional application No.61/ of SIGNAL IN SUPPORT OF UPLINK MULTIPLE-INPUT MULTIPLE-OUTPUT " 293,991 priority, the provisional application are assigned to present assignee, therefore clearly simultaneously by reference by it Enter herein.

Technical field

In summary, description below is related to wireless communication, specifically, being related to multiplexing demodulation in wireless communications Reference signal.

Background technique

Various types of Content of Communication that wireless communication system is widely deployed in order to provide voice, data etc.. Typical wireless communication system can be can by shared free system resources (for example, bandwidth, transmission power ...) prop up Hold the multi-address system with the communication of multiple users.The example of these multi-address systems may include CDMA (CDMA) system, when Divide multiple access (TDMA) system, frequency division multiple access (FDMA) system, orthogonal frequency division multiple access (OFDMA) system etc..In addition, these systems can To meet such as third generation partner program (3GPP), 3GPP long term evolution (LTE), Ultra-Mobile Broadband (UMB), evolution data Optimize the specification of (EV-DO) etc..

In general, wireless multiple-access communication system can support the communication of multiple mobile devices simultaneously.Each mobile device can be with It is communicated by the transmission on forward link and reverse link with one or more base stations.Forward link (or downlink) Refer to that the communication link from base station to mobile device, reverse link (or uplink) refer to the communication of slave mobile device to base station Link.Furthermore, it is possible to pass through single-input single-output (SISO) system, multiple input single output (MISO) system, multiple-input and multiple-output (MIMO) system etc. establishes the communication between mobile device and base station.In addition, in peer to peer wireless network configuration, mobile device It can be communicated with other mobile devices (and/or base station with other base stations).

In addition, demodulated reference signal (DM-RS) can be sent to base station to realize to from the received communication of equipment by equipment Carry out channel estimation.In addition, for example, single user (SU)-MIMO can be used to be communicated with base station, for example, in LTE in equipment In can support SU-MIMO.In this example, equipment can by multiple layers in similar time resource/frequency resource with Base station is communicated.For example, signal can be provided by mutiple antennas in same or similar time resource and frequency by equipment It is sent on source (such as one or more tones of one or more orthogonal frequency division multiplexing (OFDM) symbols), and can be used as this The summation of a little signals is received in base station.Thus, for example, equipment can be on same or like time resource and frequency resource DM-RS is sent to base station for each of these signals signal, to help to estimate channel.

Summary of the invention

The brief overview of one or more aspects is given below, in order to provide to the basic comprehension in terms of these.The general introduction Part is not the general summary to all contemplated aspects, is not intended to the mark all key of aspect or important element or description Any or all aspects range.Its purpose is only that as provided preamble in greater detail hereinafter, in simplified form Some designs of one or more aspects are provided.

According to one or more embodiments and its corresponding disclosure, equipment is directed to for being multiplexed in conjunction with helping to derive Cyclic shift (CS) value and/or orthogonal covering codes (OCC) of demodulated reference signal (DM-RS) transmitted by multiple layers of communication are come Various aspects are described.For example, can (for example, in down link control information (DCI) or similar signaling) from base station receive CS index, and can be determined based in part on the CS index in multiple layers each layer of CS value and/or OCC.In addition, for example, it is also possible to based in part on the received CS value being configured of one or more highers from equipment To determine CS value and/or OCC.Therefore, base station be not necessarily to for equipment communication multiple layers all with signal form send CS with OCC information.

According to an example, a kind of method for being multiplexed DM-RS in multiple-input and multiple-output (MIMO) communication is provided, This method comprises: receiving the CS index for sending DM-RS on each layer in multiple layers；And based in part on institute CS index is stated to determine the CS value and OCC for sending each of DM-RS DM-RS.This method further include: according to institute CS value and the OCC are stated to send the DM-RS.

In another aspect, provide it is a kind of for being multiplexed the device of DM-RS in the mimo communication, the device include extremely A few processor, at least one described processor are configured as: acquisition sends DM-RS on each layer in multiple layers CS index.At least one described processor is also configured to determine based in part on the CS index for sending The CS value and OCC of each of DM-RS DM-RS；And the DM-RS is sent according to the CS value and the OCC. In addition, the device includes memory, the memory is coupled at least one described processor.

In a further aspect, provide a kind of for being multiplexed the device of DM-RS in the mimo communication, which includes: For receiving the module for sending the CS index of DM-RS on each layer in multiple layers；And at least partly root The module of the CS value for sending each of DM-RS DM-RS is determined according to the CS index.The device further include: For determining the module of the OCC for each of DM-RS DM-RS based in part on CS index；And it is used for root The module of the DM-RS is sent according to the CS value and the OCC.

In addition, in another aspect, providing a kind of method for multiple-input and multiple-output (MIMO) communication, this method It include: cyclic shift (CS) index sent for demodulated reference signal (DM-RS)；And multiple in MIMO communication The DM-RS is received on layer.Each of DM-RS DM-RS can be associated with CS value and orthogonal covering codes (OCC). The CS value and the OCC can be based at least partially on the CS index.

In addition, in a further aspect, providing a kind of device for multiple-input and multiple-output (MIMO) communication, the device It include: the module that the cyclic shift (CS) for sending for demodulated reference signal (DM-RS) indexes；And for described The module of the DM-RS is received in MIMO communication on multiple layers.Each of DM-RS DM-RS can with CS value and Orthogonal covering codes (OCC) are associated.The CS value and the OCC can be based at least partially on the CS index.

In another aspect, a kind of computer program product for multiple-input and multiple-output (MIMO) communication is provided, The computer program product includes computer readable storage medium, which includes: for making at least one A computer sends the instruction indexed for the cyclic shift (CS) of demodulated reference signal (DM-RS)；And for make it is described extremely A few computer receives the instruction of the DM-RS in MIMO communication on multiple layers.Each of described DM-RS DM-RS is associated with CS value and orthogonal covering codes (OCC).The CS value and the OCC are based at least partially on the CS index.

In addition, in another aspect, providing a kind of computer program production for being multiplexed DM-RS in the mimo communication Product, the computer program product include computer-readable medium, which includes for making at least one calculating Machine obtains the instruction that the CS index of DM-RS is sent on each layer in multiple layers.The computer-readable medium further include: For keeping at least one described computer every in the DM-RS for sending to determine based in part on the CS index The CS value of one DM-RS and the instruction of OCC；And for making at least one described computer according to the CS value and the OCC To send the instruction of the DM-RS.

According to another example, a kind of be used for CS index or OCC in multiuser MIMO (MU-MIMO) communication is provided The method for being supplied to equipment, this method comprises: being that the first equipment selects the first CS index or the first OCC and selects for the second equipment Select the 2nd CS index and the 2nd OCC, second equipment in MU-MIMO communication with first device pairing.This method is also It include: that the index of the first CS index or the first OCC are sent to first equipment with signal form, and by institute The index for stating the 2nd CS index or the 2nd OCC is sent to the second equipment with signal form.

In another aspect, it provides a kind of for CS index or OCC to be supplied to equipment in MU-MIMO is communicated Device, the device include at least one processor, at least one described processor is configured as: determining the first CS for the first equipment Index or the first OCC select the 2nd CS index or the 2nd OCC for the second equipment, second equipment in MU-MIMO communication and First device pairing；And the index of the first CS index or the first OCC is sent to first equipment.Institute At least one processor is stated to be also configured to the index of the 2nd CS index or the 2nd OCC being sent to described second Equipment.In addition, the device includes memory, the memory is coupled at least one described processor.

In a further aspect, it provides a kind of for CS index or OCC to be supplied to equipment in MU-MIMO is communicated Device, the device include: for selecting the first CS index for the first equipment and selecting the mould of the 2nd CS index for the second equipment Block, second equipment MU-MIMO communication in first device pairing；And for for first equipment selection the One OCC and the module that the 2nd OCC is selected for second equipment.The device further include: for by the first CS index or The index of first OCC is sent to first equipment with signal form, and by the 2nd CS index or described second The index of OCC is sent to the module of second equipment with signal form.

In addition, in another aspect, providing a kind of for being supplied to CS index or OCC in MU-MIMO communication The computer program product of equipment, the computer program product include computer-readable medium, which includes For making at least one first equipment of computer determine the first CS index or the first OCC and being that the second equipment determines the 2nd CS Index or the 2nd OCC instruction, second equipment MU-MIMO communication in the first device pairing.Computer-readable Jie Matter further include: for making at least one described computer that the index of the first CS index or the first OCC is sent to institute State the instruction of the first equipment；And for making at least one described computer by the 2nd CS index or the 2nd OCC Index is sent to the instruction of second equipment.

In order to realize foregoing purpose and related purpose, one or more aspects, which are included in, to be hereinafter fully described and in right The feature particularly pointed out in it is required that.Certain illustrative spies of one or more aspects are set forth in detail in following description and drawings Sign.However, these features only indicate can be used the several ways in the various modes of the principle of various aspects, and the description It is intended to include all such aspects and its equivalent form.

Detailed description of the invention

Disclosed aspect is described below in conjunction with attached drawing, providing these attached drawings is to explain rather than limits disclosed side Face, wherein identical label indicates identical element, and wherein:

Fig. 1 shows the exemplary system for being communicated in multiple-input and multiple-output (MIMO) using multiple layers.

Fig. 2 shows for sending the exemplary system for multiple layers of demodulated reference signal (DM-RS) in MIMO.

Fig. 3 show in multiuser MIMO (MU-MIMO) by cyclic shift (CS) index or orthogonal covering codes (OCC) it is supplied to the exemplary system of one or more equipment.

Fig. 4 shows the illustrative methods for determining CS value or OCC for multiple DM-RS in MIMO.

Fig. 5 is shown for sending CS index and/or OCC in MU-MIMO with signal form to maintain orthogonality Illustrative methods.

Fig. 6 is shown for determining for sending the CS value of multiple DM-RS and/or the EXEMPLARY MOBILE DEVICE of OCC.

Fig. 7 shows the exemplary system for CS index or OCC to be supplied to one or more equipment in MU-MIMO System.

Fig. 8 shows the exemplary system for determining CS value or OCC for multiple DM-RS in MIMO.

Fig. 9 is shown for sending CS index and/or OCC in MU-MIMO with signal form to maintain orthogonality Exemplary system.

Figure 10 shows the example wireless communications according to various aspects given herein.

Figure 11 is shown can be in conjunction with the example wireless network environment that each system and method as described herein use.

Specific embodiment

Various aspects will now be described with reference to the drawings.In the following description, for purposes of explanation, it gives a large amount of specific Details, in order to provide the comprehensive understanding to one or more aspects.Come it may be evident, however, that these details can also do not had to Realize these aspects.

As further illustrated in this paper, cyclic shift (CS) value and/or orthogonal covering codes (OCC) can be by equipment at least Partly derived according to the CS index sent with signal form.For example, multiple-input and multiple-output (MIMO) (example can be used in equipment Such as, Single User MIMO (SU-MIMO), multiuser MIMO (MU-MIMO) etc.) it is communicated with base station, and can therefore send Corresponding each layer of demodulated reference signal (DM-RS) is communicated for MIMO.Equipment can receive with signal form transmission CS index, and needle is derived based in part on the CS index that sends with signal form, another CS value being configured etc. To each layer of CS value and/or OCC.In addition, for example, can be additionally or alternatively by OCC or relative index with signal shape Formula is explicitly sent to equipment.In either event, it can be derived according to the CS index individually received for multiple The CS value and/or OCC of layer, this can save signal resource.In addition, even if the paired device in MU-MIMO is with different In the case where transmission bandwidth, it can also be maintained by selecting certain CS index and/or OCC for these equipment for these equipment Orthogonality.

Term " component " used in this application, " module ", " system " etc. are intended to include and computer-related entity, example Such as, but not limited to: hardware, firmware, hardware and software combination, software or software in execution.For example, component can be but simultaneously It is not limited to: process, processor, object, executable program, the thread of execution, program and/or the computer run on processor. For example, the application program and the calculating equipment run on the computing device can be component.One or more components can To be located in the process executed and/or thread, and component can be located on a computer and/or be distributed in two or more Between platform computer.Furthermore, it is possible to execute these by a variety of computer-readable mediums for being stored thereon with plurality of data structures Component.These components can have the signal of one or more data groupings by locally and/or remotely process, such as basis (for example, from the data of a component, wherein the component by the signal with it is another in local system, distributed system One component interacts, or interact on network (such as internet) with other systems) it is communicated.

In addition, describing various aspects herein in conjunction with terminal, which can be catv terminal or wireless terminal.Terminal It is properly termed as system, equipment, subscriber unit, subscriber station, movement station, mobile station, mobile device, distant station, remote terminal, access Terminal, user terminal, terminal, communication equipment, user agent, user apparatus or user equipment (UE).Wireless terminal can be bee Cellular telephone, satellite phone, wireless phone, Session initiation Protocol (SIP) phone, wireless local loop (WLL) is stood, individual digital helps Reason (PDA), the handheld device with wireless connection capability calculate equipment or are connected to other processing of radio modem and set It is standby.In addition, describing various aspects herein in conjunction with base station.Base station can be used for being communicated with wireless terminal, and base station It is properly termed as access point, node, node B, evolved node B (eNB) or some other term.

In addition, term "or" is intended to mean that inclusive "or" rather than exclusive "or".That is, It unless specified otherwise or can understand from context and learn, otherwise phrase " X use A or B ", which is intended to indicate that, any naturally includes Property displacement.That is, any one of following example all meets phrase " X uses A or B ": X uses A；X uses B；Or Person X uses A and B both.In addition, can understand that learn is otherwise this Shen for singular unless specified otherwise or from context It please should usually be interpreted to indicate " one or more " with "one" with the article " one " used in appended claims.

The techniques described herein can be used for various wireless communication system, such as CDMA, TDMA, FDMA, OFDMA, SC- FDMA and other systems.Term " system " and " network " are usually used interchangeably.Cdma system may be implemented such as general land without Line accesses the wireless technology of (UTRA), cdma2000 etc..UTRA includes other deformations of broadband-CDMA (W-CDMA) and CDMA. In addition, cdma2000 covers IS-2000 standard, IS-95 standard and IS-856 standard.Such as whole world shifting may be implemented in TDMA system The wireless technology of dynamic communication system (GSM) etc.Such as evolved UTRA (E-UTRA), super movement may be implemented in OFDMA system Broadband (UMB), IEEE802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Deng wireless technology.UTRA and E-UTRA is a part of Universal Mobile Telecommunications System (UMTS).3GPP long term evolution (LTE) is Using the version of the UMTS of E-UTRA, OFDMA is used on the uplink and uses SC-FDMA on uplink.Coming Described from the file of the tissue of entitled " third generation partner program " (3GPP) UTRA, E-UTRA, UMTS, LTE and GSM.In addition, describing cdma2000 in the file of the tissue from entitled " third generation partner program 2 " (3GPP2) And UMB.In addition, such wireless communication system can be also comprised usually using azygous unlicensed spectrum, 802.xx is wireless Equity (for example, mobile station to mobile station) ad-hoc network system of LAN, bluetooth and any other low coverage or long distance wireless communication technique System.

Various aspects or feature will be introduced around the system that may include multiple equipment, component, module etc..It should be understood that With it is clear that various systems may include additional equipment, component, module etc., and/or can not include in conjunction with attached drawing discussion Equipment, component, module etc. whole.Also the combination of these methods can be used.

Referring to Fig.1, the wireless communication system 100 for helping to be communicated over multiple channels is shown.System 100 includes Base station 102, the base station 102 and equipment 104 communicate to provide the access for arriving wireless network.As shown, base station 102 It can be communicated by mutiple antennas with equipment 104.For example, base station 102 may include antenna 106 and/or one or more Additional antenna (not shown), equipment 104 can include at least antenna 108 and 110 (and/or additional antenna), for making It is communicated on multiple layers with MIMO.Base station 102 can be macrocell, Femto cell, picocell or similar base Stand, relay node, mobile base station, with equity or the equipment communicated from group mode, part of it etc..Equipment 104 can be with It is UE, modem (or other networked devices), part of it etc..

According to an example, equipment 104 can be used both antennas 108 and 110 and uplink signal is sent to base station 102, antenna 108 and 110 can be physical antenna or virtual-antenna.Use both antennas 108 and 110 (and/or additional day Line) allow equipment 104 to be communicated using MIMO with base station 102.Therefore, equipment 104 is led on multiple layers with base station 102 Letter, wherein multiple each layer of layer both corresponds to antenna 108 and/or 110.For example, each layer can correspond to the phase in MIMO Same time resource and frequency resource, and equipment 104 can carry out sky to each layer of signal on time and frequency resource Between be multiplexed, to provide certain interval (separation) for receiving these signals.In this respect, base station 102 can given Fixed period is inscribed to be received in from the summation of the signal of transmission simultaneously of antenna 108 and 110 in frequency resource, and can at least portion Divide ground according to these signals are demultiplexed to distinguish these signals.For example, this can be by allowing to provide without using the additional time Multiple signals are sent in the case where source and frequency resource, to allow the increased handling capacity of equipment 104.Equipment 104 can be sent For each layer of DM-RS, base station 102 can receive and be estimated using the DM-RS for each of these signals letter Number channel.

In order to provide improved interlayer orthogonality for DM-RS transmission, equipment 104 can be by the interval CS with making main multiplexing side Case, and/or the interval OCC is used as supplement multiplexing scheme.Thus, for example, each layer of DM-RS can have different be associated CS value and/or OCC.CS, which can refer to, carries out cyclic shift to DM-RS in the time domain.For example, for CS value n_cs, corresponding to send out The DM-RS signal sequence sent can indicate in the time domain are as follows: r (mod (n-Mn_cs, 12M)), wherein the multiple that M can be with 12 The DM-RS sequence length of expression, n can indicate the time index from 0 to 12M-1；Also, the signal sent can be on frequency domain It is expressed as, wherein R (k)=DFT { r (n) } is the public basic sequence for executing CS at different layers, and k can To be the tone index from 0 to 12M-1.For example, subframe can refer to the set of time resource and frequency resource, and can wrap One or more symbols are included, the subset of time resource are each at least in these symbols, and time slot can be including one The time portion of the subframe of a or multiple glossary of symbols.For example, symbol can correspond to orthogonal frequency division multiplexing (OFDM) in LTE Symbol may include a part (for example, set of the carrier wave in frequency band) of the frequency within 1 millisecond of period.For example, The subframe of uplink communication in LTE may include two time slots, and each time slot includes the set of 6 or 7 OFDM symbols, This depends on cyclic prefix (CP).

In an example, equipment 104 can be derived based in part on the CS index received for it is multiple The CS value and/or OCC of the corresponding DM-RS of each layer in layer.For example, can be (for example, the physical down in such as LTE In the control channel of link control channel (PDCCH) etc) it receives from base station 102 as down link control information (DCI) The CS index of a part.Therefore, base station 102 does not need to send the CS value for each of DM-RS DM-RS with signal form And/or OCC, and equipment 104 does not need to receive the CS value and/or OCC for each of DM-RS DM-RS, and this can lead to Expense needed for reducing signaling is crossed to save time and this signal resource.Similarly, as described, equipment 104 can be into The CS value being configured that one step is received based in part on the higher from equipment 104 derives these CS values.In addition, In an example, base station 102 explicitly can send OCC with signal form and/or equipment 104 can also be at least partly The OCC for each layer is derived according to CS index and/or the CS value being configured.In an example, equipment 104 can be at least Partly according to pre-defined rule associated with the antenna amount at CS index (and/or the CS value being configured) and/or equipment 104 To derive CS value.In specific example, equipment 104 can by the CS index received in DCI and/or according to CS index and The CS value that the CS value being configured calculates distributes to antenna 108, with for sending DM-RS, CS value is being indicated hereinabove as n_cs.Then, (for example, since up to 12 different CS can be used in LTE) equipment 104 can be by CS value: n_cs+ 6 distribute to antenna 110, to be used to send DM-RS, to provide the maximum interval CS.

Fig. 2 is gone to, illustrative wireless communication system 200 is shown, which facilitates logical in MIMO It derives in letter for sending CS value and/or OCC for multiple layers of DM-RS.System 200 includes carrying out with equipment 204 wirelessly The base station 202 of communication (for example, to provide wireless network access to equipment 204).Base station 202 can be macrocell, femto Cell, picocell or similar base station, relay node, mobile base station, equity or from the equipment in group mode, part of it Etc., and equipment 204 can be UE, modem, part of it etc..In addition, equipment 204 may include: that CS index connects Component 206 is received, for obtaining the CS index for sending DM-RS from base station；And CS value derives component 208, for determining needle To the CS value of one or more DM-RS related with one or more MIMO communication layers at equipment 204.Equipment 204 can be with It include: that OCC determines component 210, for receiving OCC related with one or more DM-RS；And DM-RS sends component 212, DM-RS is sent for using corresponding CS value and/or OCC.

According to an example, base station 202 can by control channel in DCI by the CS index for being used to send DM-RS with Signal form is sent to equipment 204.In this example, CS value derives component 208 and can count based in part on CS index Calculate the CS value for being directed to DM-RS related with multiple layers of equipment 204.In an example, CS value derivation component 208 can be into one The quantity based in part on layer or corresponding physical antenna or virtual-antenna in MIMO is walked to calculate for DM-RS's CS value.In this respect, in an example, CS value, which derives component 208, can calculate CS value so as to between DM-RS offer maximum Every.For example, CS value, which derives component 208, can calculate CS according to for layer and/or the pre-defined rule of the quantity of corresponding antenna Value.In addition, for example, OCC determines that component 210 can obtain OCC index in DCI or send according further to signal form CS index derive OCC index.In an example, according to following table, OCC index can correspond to the OCC that length is 2.

OCC index	OCC
		0	[+1,+1]
1	[+1,–1]

Wherein, OCC is applied to DM-RS signal on two time slots in subframe.In addition, as described, CS value pushes away It leads component 208 and can also be obtained from higher (for example, wireless heterogeneous networks (RRC) layer, application layer, or similar layer) and is configured CS value, and CS value and/or OCC can be further derived based in part on the CS value being configured.In this respect, DM- RS sends component 212 can be according to the CS value and/or OCC derived (for example, by the way that OCC is applied to corresponding DM-RS simultaneously And DM-RS is sent using corresponding CS value) send for each layer of DM-RS in multiple layers.

In a specific example, up to 12 different CS indexes can be used in LTE.In following example In, for illustrative purposes, show the previous case.In this example, CS index receiving part 206 can obtain in DCI CS index is obtained, and CS value derives component 208 and can determine based in part on the quantity of CS index and layer for equipment 204 each layer of CS value.For example, CS value, which derives component 208, selects the CS value for making the margin maximization on each layer.In addition, It is true that OCC determines that component 210 can come based in part on CS index and/or from the received another CS value being configured of higher Surely it is directed to each layer of OCC index.For example, OCC determine component 210 can to corresponding UL license in signal form dynamic The CS value of CS index and higher that ground is sent being configured is summed (for example, with 12 for mould or other way), is come true Determine the CS value for selecting OCC.In this example, OCC determines that component 210 can be based in part on such as following table etc Reservation chart selects OCC.

CS value

0

1

2

3

4

5

6

7

8

9

10

11

OCC index

0

1

0

1

0

1

0

1

0

1

0

It should be understood that OCC determine component 210 substantially can based in part on the CS index received, come From the CS value of higher being configured, CS value calculated, CS index or CS value to the mapping of OCC index or practical OCC etc. Any function determines OCC index.

In the example using LTE, by CS index receiving part 206, received CS index can be 3 ratios in DCI Spy, this is individually not sufficient to indicate 12 kinds of possibility of CS value；In an example, the value of 3 bits can indicate in table with black CS value (for example, 0,2,3,4,6,8,9 and 10) shown in body.Therefore, CS value derives component 208 and can receive from higher through matching The CS value set, wherein OCC determines that component 210 can use the CS value being configured in conjunction with CS index received in DCI, with Just the CS value for determining OCC index is calculated, this, which can permit, also includes above 1,5,7 and 11.In another reality In example, it should be apparent that, OCC determines that component 210 substantially can be based in part on such as by the resource point of DCI instruction Any value sent with signal form with (for example, starting and/or end index of Physical Resource Block) etc or reflecting to it It penetrates individually or with other values (such as the CS index etc. sent with signal form) to combine and to derive OCC index.

In an example, CS value derives component 208 can be used following pre-defined rule during determining CS value In one or more rule and/or OCC determine that these rules can be used in the mimo communication to be each in component 210 Layer (for example, physical antenna or virtual-antenna) selects OCC, whereinIt can indicate to be received by CS index receiving part 206 , such as UL license etc DCI in signal form send CS index.

The transmission of order -1 (for example, for transmission using 1 antenna)

The transmission of order -2 (for example, for transmission using 2 antennas)

The transmission of order -3 (for example, for transmission using 3 antennas)

Select the non-unified interval CS in 1:DM-RS transmission

Select the unified interval CS in 2:DM-RS transmission

The transmission of order -4 (for example, for transmission using 4 antennas)

In this example, OCC determine component 210 can explicitly according to DCI value, implicitly according to CS index (or its Its DCI value) and corresponding reservation chart (as shown above in an example) etc. determine I_OCC, i.e. OCC index.In addition, should It is clear that summation illustrated above can be mould with 12, so that CS value is between 0 and 11.For example, in the transmission of order -4 For physical antenna/virtual-antenna, CS value derives component 208 and can calculate separately CS value are as follows: mod 12、12 He of modmod 12。

In addition, allowing further Separated pin to each layer of DM- using the option A for different OCC as shown above RS, this can provide better throughput performance to equipment 204.Therefore, option A is optimized for SU-MIMO transmission.It is practical On, can also will use the device pairing of different OCC together, no matter while CS value how all to keep orthogonal DM-RS.Example Such as, as described in further detail below, base station 202 implicitly or explicitly can send I to equipment 204 with signal form_OCC And 1-I is sent with signal form to other equipment_OCC.In either event, no matter transmission bandwidth, can for The DM-RS of equipment 204 and other device-dependents maintains orthogonality.

Referring to Fig. 3, the example wireless communications 300 for helping to select OCC for equipment in MU-MIMO are shown. System 300 includes base station 302, the base station 302 and equipment 304 and 306 carry out wireless communication (for example, so as to equipment 304 and 306 provide wireless network access).As described, base station 302 can be macrocell, Femto cell, picocell or class As base station, relay node, mobile base station, with equity or from the equipment in group mode, part of it etc., equipment 304 and 306 It can be UE, modem, part of it etc..Base station 302 may include: CS alternative pack 308, set for one or more It is standby to determine CS index；Optional OCC alternative pack 310 determines OCC for one or more equipment；And DCI sends component 312, DCI is sent to one or more equipment with signal form.

According to an example, base station 302 can be matched equipment 304 and 306 to be used to communicate in MU-MIMO, To provide similar time resource and frequency resource to equipment 304 and 306.Therefore, in an example, CS alternative pack 308 can determine different CS indexes for equipment 304 and equipment 306, have not simultaneous interpretation to avoid in equipment 304 and equipment 306 Conflict in the case where defeated bandwidth.In another example, OCC alternative pack 310, which can be determined, is supplied to equipment for OCC index 304, with the DM-RS for OCC to be applied to be sent by equipment 304, and can determine different OCC indexes (for example, 1- I_OCC, wherein as described above, OCC alternative pack 310 is by I_OCCDistribute to equipment 304) it is supplied to equipment 306.In any one feelings Under condition, DCI sends component 312 and corresponding CS index and/or OCC index can be transferred to and be set in DCI by control channel Standby 304 and equipment 306.Thus, for example, as described above, equipment 304 and 306 can be sent out based in part on signal form The value sent derives CS value and OCC for each communication layers.Because equipment 304 and 306 uses different CS and/or different OCC sends DM-RS, so, orthogonality can be maintained for DM-RS.In an example, in the case where option B above, CS alternative pack 308 determines that similar CS index, OCC alternative pack 310 are that equipment 304 and 306 determines different OCC.

Referring to Fig. 4-Fig. 5, show related with the CS value for being used for sending DM-RS in the mimo communication and/or OCC is determined Illustrative methods.Although these methods are depicted and described as sequence of operations in order to simplify the purpose of explanation, however, it should It being understood and appreciated that, these methods are not limited by operation order, this is because according to one or more embodiments, it is some Operation can be occurred by different order and/or be occurred simultaneously with other operations shown and described herein.Such as, it should be apparent that , method can also optionally be expressed as a series of state or events of being mutually related in such as state diagram.In addition, in order to Realize the method according to one or more embodiments, not shown all operationss are all required.

Referring to Fig. 4, the example for determining CS value and OCC to carry out DM-RS transmission in multiple communication layers is shown Property method 400.At 402, the CS index that DM-RS is sent on each layer in multiple and different layers can receive.As institute Description, CS index, and the physics day that different layers can be communicated with for MIMO can be received in the DCI from base station Line or virtual-antenna are related, allow to send the DM-RS for each layer.It, can be based in part on CS rope at 404 Attract the CS value and OCC determined for sending each of DM-RS DM-RS.For example, as described, it can be according to predetermined Rule and/or further determine CS value according to the quantity of layer.As described, which can be according to the number of CS index and layer Measure the margin maximization to make DM-RS.Furthermore, it is possible to further based in part on from higher (for example, rrc layer, application Layer etc.) the received CS value being configured determines OCC.At 406, DM-RS can be sent according to cyclic shift and OCC.

Fig. 5 is gone to, is shown for showing OCC with the equipment that signal form is sent to pairing in MU-MIMO is communicated Example property method 500.At 502, the first CS index or the first OCC can be selected for the first equipment, and can be in MU-MIMO The 2nd CS index or the 2nd OCC are selected with the second equipment of the first device pairing in communication.First OCC can be different from second OCC.As described, each of the first OCC and the 2nd OCC can be one in two possible OCC.At 504, it can incite somebody to action The index of first CS index or the first OCC are sent to the first equipment with signal form, at 506, can by the 2nd CS index or The index of 2nd OCC is sent to the second equipment with signal form.As described, this may include in DCI by the first CS rope Draw or the first OCC and the 2nd CS index or the 2nd OCC are sent to the first equipment and the second equipment respectively with signal form.Such as Described, in this respect, the first equipment and the second equipment can maintain orthogonality, for sending DM-RS.

It should be understood that as described, it, can be for determining CS value according to one or more aspects as described herein Or OCC is to make inference for sending DM-RS etc. in the mimo communication.Term as used herein " deduction " or " inference " are logical It often refers to pushing away system, environment and/or the state of user according to by event or one group of observed quantity of data acquisition Reason or the process inferred.It is, for example, possible to use inferences to identify specific context or operation, or can produce shape probability of state Distribution.This inference can be probabilistic, that is to say, that according to the data and event considered, to state of interest Probability distribution is calculated.Inference can also refer to the technology for constituting advanced event according to one group of event and/or data.This The event data of event and/or storage that inference allows to observe according to one group is planted to construct new event or operation, and No matter whether event is related on the hand-to-hand time, one or several events and data whether are come from regardless of event and data Source.

Fig. 6 contributes to the schematic diagram for sending the mobile device 600 for multiple layers of DM-RS in the mimo communication.It moves Dynamic equipment 600 includes receiver 602, which receives signal for example, by receiving antenna (not shown), to what is received Signal executes typical operation (for example, filtering, amplification, down coversion etc.) and is digitized the signal after adjusting to obtain Sampling.Receiver 602 may include demodulator 604, the demodulator 604 symbol received can be carried out demodulation and by its Processor 606 is supplied to carry out channel estimation.Processor 606, which can be, is exclusively used in analysis by the received information of receiver 602 And/or the processor of the information sent by transmitter 608 is generated, control one or more components of mobile device 600 Processor, and/or not only analyzed by the received information of receiver 602, and generated by information that transmitter 608 is sent but also control shifting The processor of one or more components of dynamic equipment 600.

Mobile device 600 can also comprise memory 610, which is operatively coupled to processor 606, and can store: the data to be sent, the data received, information related with available channel, with the letter analyzed Number and/or the associated data of interference strength, the related information with allocated channel, power, rate etc., and for estimating Channel and any other information appropriate communicated by channel.Memory 610 can in addition store and estimate and/or Use associated (for example, based on performance, based on capacity the etc.) agreement of channel and/or algorithm.

It is noted that data storage (for example, memory 610) as described herein can be volatile memory or Nonvolatile memory, or may include both volatile memory and nonvolatile memory.For example rather than limit Ground, nonvolatile memory may include read-only memory (ROM), programming ROM (PROM), electrically programmable ROM (EPROM), Electrically erasable PROM (EEPROM) or flash memory.Volatile memory may include the random access memory as external cache memory Device (RAM).For example and unrestrictedly, RAM is there are many available form, for example, synchronous random access memory (SRAM), dynamic ram (DRAM), Synchronous dram (SDRAM), Double Data Rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronization links DRAM (SLDRAM) and direct Rambus RAM (DRRAM).The memory 610 of the system and method for the application is intended to include and is not limited to The memory of these and any other appropriate type.

Processor 606 can also optionally be operatively coupled to CS index receiving part 612, and (it can be with CS index Receiving part 206 is similar) and CS value derivation component 614 (it is similar that it can derive component 208 with CS value).Processor 606 is also OCC can be alternatively, operatively coupled to and determine component 616 (it can determine that component 210 is similar with OCC) and DM-RS hair Send component 618 (it is similar that it can send component 212 with DM-RS).Mobile device 600 still further comprises modulator 620, the tune Device 620 processed is modulated signal, to be sent to such as base station, another mobile device by transmitter 608.Although by CS rope Draw receiving part 612, CS value derive component 614, OCC determine component 616, DM-RS send component 618, demodulator 604 and/or Modulator 620 is shown as separating with processor 606, it will be understood that these components can be processor 606 or multiple places Manage a part of device (not shown).In addition, for example, DM-RS transmission component 618 can be during being applied to DM-RS for OCC Use modulator 620.

Fig. 7 contributes to that CS index or OCC index are sent to one or more with signal form in MU-MIMO communication The schematic diagram of the system 700 of equipment.System 700 include base station 702, the base station 702 substantially can be any base station (for example, The small base station of Femto cell, picocell etc., relay node, mobile base station ...), have and pass through multiple reception days Line 706 (for example, as described, can have multiple network technology) receives signal from one or more mobile devices 704 Receiver 710 and by multiple transmitting antennas 708 (for example, as described, can have multiple network technology) to one The transmitter 726 that a or multiple mobile devices 704 are sent.In addition, in an example, transmitter 726 can be wired Front-end chain road is sent to mobile device 704.Receiver 710 can receive information from one or more receiving antennas 706, And it is operationally associated with the demodulator 712 demodulated to the information received.In addition, in an example, receiving Machine 710 can be received from wired backhaul.Demodulated symbol is analyzed by processor 714, and processor 714 can be with Similar with the processor above with reference to described in Fig. 6, which is coupled to memory 716, which stores and estimate Meter signal (for example, pilot tone) intensity and/or the related information of interference strength will be sent to (or the different base station of mobile device 704 (not shown)) data or slave mobile device 704 (or different base station (not shown)) received data, and/or with execute sheet The related any other adequate information of the various operations and functions that text provides.

Processor 714 is also optionally coupled to CS alternative pack 718 (it can be similar with CS alternative pack 308), OCC choosing Component 720 (it can be similar with OCC alternative pack 310) and DCI is selected to send component 722 (it can send component with DCI 312 is similar).In addition, for example, modulator 724 can be used in processor 714 is modulated to the data to be sent, and use Transmitter 726 sends modulated signal.Transmitter 726 can send signal to mobile device 704 by Tx antenna 708. Although in addition, CS alternative pack 718, OCC alternative pack 720, DCI are sent component 722, demodulator 712 and/or modulator 724 are shown as separating with processor 714, it will be understood that these components can be processor 714 or multiple processors A part of (not shown).

Referring to Fig. 8, the system 800 for sending the DM-RS for multiple communication layers is shown.For example, system 800 can be at least It is positioned partially in base station, mobile device etc..It should be understood that system 800 is expressed as to include functional block, these functional blocks It can be the functional block for indicating the function of being realized by processor, software or combinations thereof (for example, firmware).System 800 includes can be with The logical groups 802 of the electronic component of joint operation.For example, logical groups 802 may include: for receiving in multiple and different layers In each layer on send DM-RS CS index electronic component 804.For example, CS index can be received in DCI, and CS Index can be related to sending a DM-RS.In addition, logical groups 802 may include: true for coming based in part on CS index Determine the electronic component 806 for sending the CS value of each of DM-RS DM-RS.For example, as described, electronic component 806 The CS value for sending each DM-RS can be calculated according to CS index.

In addition, logical groups 802 may include: for being determined based in part on CS index for every in DM-RS The electronic component 808 of the OCC of one DM-RS.In addition, as described, electronic component 808 can further at least partly root OCC is determined according to the CS value being configured received from higher.In addition, logical groups 802 may include: for according to CS value and OCC sends the electronic component 810 of DM-RS.As described, for example, OCC can be applied to DM-RS by electronic component 810, And index corresponding with the CS value for DM-RS derived can be used and send DM-RS on the ofdm symbols.

For example, electronic component 804 may include CS index receiving part 206.In addition, for example, in an aspect, electronics Component 806 may include that CS value derives component 208.Also, for example, in an aspect, electronic component 808 may include OCC Determine component 210.In addition, in an aspect, electronic component 810 may include that DM-RS sends component 212.In addition, system 800 may include memory 812, which saves associated with electronic component 804,806,808 and 810 for executing Function instruction.Although being shown as electronic component 804,806,808 and 810 in the outside of memory 812 it should be appreciated that , one or more of these electronic components can reside in the inside of memory 812.

In an example, electronic component 804,806,808 and 810 may include at least one processor, or each Electronic component 804,806,808 and 810 can be the corresponding module of at least one processor.In addition, additional or replaceable Example in, electronic component 804,806,808 and 810 can be the computer program product including computer-readable medium, In, each electronic component 804,806,808 and 810 can be corresponding instruction and/or code.

Referring to Fig. 9, shows and be with what signal form was sent to equipment by CS index and/or OCC in MU-MIMO communication System 900.For example, system 900 can be at least partially situated in base station, mobile device etc..It should be understood that by system 900 It is expressed as including functional block, these functional blocks can be the function for indicating to be realized by processor, software or combinations thereof (for example, firmware) The functional block of energy.System 900 includes can be with the logical groups 902 of the electronic component of joint operation.For example, logical groups 902 can wrap It includes: for selecting CS index for an equipment and being another with the selection of the distinct device of the device pairing in MU-MIMO is communicated The electronic component 904 of CS index.For example, the equipment and the distinct device can have different transmission bandwidths, and can lead to It crosses using the different CS indexes for these equipment and keeps orthogonal.In addition, logical groups 902 may include: for being the equipment It selects OCC and selects the electronic component 906 of different OCC for the distinct device.

For example, in the case where distributing similar CS index with the distinct device to the equipment, using for these equipment Different OCC can maintain orthogonality.In addition, logical groups 902 may include: for by the index of CS index or OCC to believe Number form, which is sent to the equipment and the different index of another CS index or difference OCC is sent to the difference with signal form, to be set Standby electronic component 908.In an example, electronic component 908 can in DCI by CS index, OCC, another CS index and/ Or different OCC is sent to the equipment and the distinct device.For example, in an aspect, electronic component 904 may include CS choosing Component 308 is selected, electronic component 906 may include OCC alternative pack 310.In addition, for example, as described, in one aspect In, electronic component 908 may include that DCI sends component 312.In addition, system 900 may include memory 910, the memory 910 save for executing and the instruction of electronic component 904,906 and 908 associated functions.Although by electronic component 904,906 It is shown as with 908 in the outside of memory 910 it should be appreciated that one or more of these electronic components can be deposited It is the inside of memory 910.

In an example, electronic component 904,906 and 908 may include at least one processor or each electronics Component 904,906 and 908 can be the corresponding module of at least one processor.In addition, in additional or interchangeable example, Electronic component 904,906 and 908 can be the computer program product including computer-readable medium, wherein each ministry of electronics industry Part 904,906 and 908 can be corresponding instruction and/or code.

Referring now to fig. 10, show the wireless communication system 1000 according to various embodiments proposed in this paper.System 1000 include base station 1002, and base station 1002 may include mutiple antennas group.For example, an antenna sets may include 1004 He of antenna 1006, another group may include antenna 1008 and 1010, and another group may include antenna 1012 and 1014.For each antenna sets Show two antennas；However, more or fewer antennas can be used for each antenna sets.As clear to, base station 1002 can also comprise transmitter chain and receiver chain, wherein each of transmitter chain and receiver chain and then can be with Including sending and receiving associated multiple components (for example, processor, modulator, multiplexer, demodulator, demultiplexing with signal Device, antenna etc.).

It base station 1002 can be with one or more mobile devices of such as mobile device 1016 and mobile device 1022 etc It is communicated；It will be clear however that base station 1002 substantially can be similar to mobile device 1016 and 1022 it is any The mobile device of quantity is communicated.Mobile device 1016 and 1022 can be such as cellular phone, smart phone, meter on knee Calculation machine, hand-held communication device, Handheld computing device, satellite radio devices, global positioning system, PDA and/or for leading to Cross any other equipment appropriate that wireless communication system 1000 is communicated.As described, mobile device 1016 and antenna 1012 and 1014 are communicated, wherein antenna 1012 and 1014 sends information to mobile device on forward link 1018 1016, and slave mobile device 1016 receives information on reverse link 1020.In addition, mobile device 1022 and antenna 1004 and 1006 are communicated, wherein and antenna 1004 and 1006 sends information to mobile device 1022 on forward link 1024, and Slave mobile device 1022 receives information on reverse link 1026.For example, in frequency division duplex (FDD) system, forward link 1018 can be used the frequency band different from the frequency band used by reverse link 1020, forward link 1024 can be used with by reversed The different frequency band of the frequency band that link 1026 uses.In addition, in time division duplex (TDD) system, forward link 1018 and reverse strand Common band can be used in road 1020, and common band can be used in forward link 1024 and reverse link 1026.

Each antenna sets and/or the antenna sets is specified to be properly termed as base station 1002 in the region wherein communicated Sector.For example, antenna sets can be designed as communicating with the mobile device in the sector in the region covered by base station 1002. In the communication by forward link 1018 and 1024, beam forming is can be used to improve movement in the transmitting antenna of base station 1002 The signal-to-noise ratio of the forward link 1018 and 1024 of equipment 1016 and 1022.Also, pass through individual antenna to its all shifting with base station Dynamic equipment send and is compared, when base station 1002 using beam forming to the shifting randomly interspersed among in associated coverage area When dynamic equipment 1016 and 1022 is sent, the mobile device in adjacent cell can suffer from less interference.In addition, as retouch It states, mobile device 1016 and 1022 can be used equity or directly communicate with each other from group technology.According to an example, system 1000 can be multiple-input and multiple-output (MIMO) communication system.

Figure 11 shows illustrative wireless communication system 1100.For simplicity, wireless communication system 1100 is shown One base station 1110 and a mobile device 1150.It will be clear however that system 1100 may include more than one Base station and/or more than one mobile device, wherein additional base station and/or mobile device substantially can with it is following described Exemplary base 1110 it is similar or different with mobile device 1150.It will furthermore be apparent that base station 1110 and/or shifting System as described herein (Fig. 1-Fig. 3 and Fig. 7-Figure 10), mobile device (Fig. 6) and/or method (figure can be used in dynamic equipment 1150 4- Fig. 5) facilitate the wireless communication between them.For example, the component or function of system and or method as described herein can be with It is a part of memory 1132 and/or 1172 or processor 1130 and/or 1170 described below, and/or can be by Device 1130 and/or 1170 is managed to execute the function to realize disclosed.

At base station 1110, the business datum of multiple data flows is provided from data source 1112 to transmitting (TX) data processing Device 1114.According to an example, each data flow can be sent by corresponding antenna.TX data processor 1114 is according to needle The specific coding scheme of data flow selection is formatted business data flow, encodes and interweaves, to provide coded data.

Orthogonal frequency division multiplexing (OFDM) technology can be used to carry out the coded data of each data flow and pilot data Multiplexing.Additionally or alternatively, (FDM), time-multiplexed (TDM) or code that frequency pilot sign can be frequency division multiplexing divide multiple (CDM).Pilot data is usually processed known data patterns in a known way, and can be in mobile device 1150 Channel response is estimated using pilot data in place.Can according to for certain modulation schemes selected by each data flow (for example, two System phase shift keying (BPSK), quadrature phase shift keying (QPSK), M phase-shift keying (PSK) (M-PSK), M- quadrature amplitude modulation (M-QAM) Deng) (for example, symbol mapping) is modulated to the multiplexed pilot tone and coded data of the data flow, in order to provide modulation symbol Number.The data rate, coding and modulation of each data flow can be determined by the instruction for being executed or being provided by processor 1130.

The modulation symbol of data flow can be supplied to TX MIMO processor 1120, TX MIMO processor 1120 can be into One step (for example, being directed to OFDM) handles these modulation symbols.Then, TXMIMO processor 1120 provides NT stream of modulation symbols Give NT transmitter (TMTR) 1122a to 1122t.In various embodiments, symbol of the TX MIMO processor 1120 to data flow And sending the antenna applications beam-forming weights of the symbol.

Each transmitter 1122 receives and processes corresponding symbol stream in order to provide one or more analog signals, and into One step section (for example, amplification, filtering and up-conversion) analog signal is in order to provide being suitable for transmitting on mimo channel through adjusting Signal processed.In addition, the NT for sending spontaneous emission machine 1122a to 1122t from NT antenna 1124a to 1124t respectively is a modulated Signal.

At mobile device 1150, transmitted modulated signal is received by NR antenna 1152a to 1152r, and The signal received from each antenna 1152 is provided to corresponding receiver (RCVR) 1154a to 1154r.Each reception Machine 1154 adjusts (for example, filtering, amplification and down coversion) corresponding signal, carries out being digitized for providing to the signal after adjusting Sampling, and these samplings are further processed in order to provide corresponding " reception " symbol stream.

RX data processor 1160 can be received and processed according to specific receiver processing technique from NR receiver 1154 NR reception symbol stream, in order to provide NT " detection " symbol streams.RX data processor 1160 can be to each detection Symbol stream demodulated, deinterleaving and decoding, to restore the business datum of the data flow.What RX data processor 1160 executed It is complementary for handling with the processing of TX MIMO processor 1120 and the execution of TX data processor 1114 at base station 1110.

Reverse link message may include various types of letters related with communication link and/or the data flow received Breath.Reverse link message can be handled by TX data processor 1138, be modulated by modulator 1180, by transmitter 1154a to 1154r is adjusted, and sends back base station 1110, and wherein TX data processor 1138 is also received from data source 1136 The business datum of multiple data flows.

At base station 1110, the modulated signal from mobile device 1150 is received by antenna 1124, by receiving Machine 1122 is adjusted, and is demodulated by demodulator 1140, and is handled by RX data processor 1142, so as to extract by The reverse link message that mobile device 1150 is sent.In addition, processor 1130 can handle extracted message so that determination makes Which pre-coding matrix beam-forming weights are determined with.

Processor 1130 and 1170 can instruct (for example, control, adjustment, management etc.) base station 1110 and mobile device respectively Operation at 1150.Corresponding processor 1130 and 1170 can be with the memory 1132 of storage program instruction/code and data It is associated with 1172.Processor 1130 and 1170, which can also be performed, to be calculated to derive the frequency of uplink and downlink respectively Estimate with impulse response.

The general processor for being designed to execute function described herein, digital signal processor (DSP), dedicated can be used Integrated circuit (ASIC), field programmable gate array signal (FPGA) or other programmable logic devices, discrete gate or crystal Pipe logic, discrete hardware components or any combination thereof combine described in presently disclosed embodiment to realize or execute Various illustrative logics, logical box, module, component and circuit.General processor can be microprocessor, alternatively, the processing Device is also possible to any traditional processor, controller, microcontroller or state machine.Processor is also implemented as calculating and set Standby combination, for example, the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessors and DSP core In conjunction with or any other such structure.In addition, at least one processor may include one or more modules, it is one or Multiple modules can be operated to execute one or more steps and/or operation in above-mentioned steps and/or operation.Illustrative storage Medium may be coupled to processor, enables a processor to from the read information, and can be written to the storage medium Information.Alternatively, storage medium is also possible to the component part of processor.In addition, in certain aspects, pocessor and storage media It can be located in ASIC.In addition, ASIC can be located in user terminal.Alternatively, pocessor and storage media can be used as it is discrete Component is located in user terminal.

In one or more aspects, the function, method or algorithm may be implemented hardware, software, firmware or its In any combination.It, can be using these functions as the one or more on computer-readable medium if realized in software Instruction or code are stored or are sent, which may be embodied in computer program product.Computer can Reading medium includes both computer storage media and communication medias, and the communication media includes facilitating computer program from one Arbitrary medium of a position transfer to another position.Storage medium can be can be by any available Jie of computer access Matter.For example and unrestrictedly, this computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other light Disk storage, magnetic disk storage or other magnetic storage apparatus or can be used for by instruct or data structure in the form of carry or Any other medium that stores desired program code and can be accessed by computer.Disk and CD packet used herein Include compact disk (CD), laser-optical disk, CD, digital versatile disc (DVD), floppy disk and Blu-ray Disc, wherein the usual magnetic of disk Property ground replicate data, and CD laser optics ground replicate data.The combination of above-mentioned items should also be included in computer-readable In the range of medium.

Although above disclosure discusses illustrative aspect and/or embodiment, it is noted that without departing from It, can be to carrying out various change herein in the case where the range of the aspect and/or embodiment being defined by the following claims Become and modifies.In addition, although the element of the aspect and/or embodiment can be described or claimed in the singular, It is limited to singular unless expressly stated, otherwise it is contemplated that plural form.In addition, unless otherwise stated, otherwise, Suo Youren All or part of of meaning aspect and/or embodiment can with any other aspect and/or embodiment all or part of one It rises and uses.

Claims

1. A method for providing a cyclic shift (CS) index and an orthogonal cover code (OCC) to a device in multi-user multiple-input multiple-output (MU-MIMO) communication, comprising:

selecting a first CS index and a first OCC for the first device;

selecting a second CS index and a second OCC for a second device, wherein the second device is paired with the first device in MU-MIMO communication;

The first CS index is signaled to the first device, wherein the first device is configured to receive all the data for transmitting multiple demodulation reference signals (DM-RS) on multiple layers. the first CS index, and determining for transmission of the plurality of DM-RSs based at least in part on a predetermined rule corresponding to the first CS index and an index for each of the plurality of layers the first CS value and the first OCC of each DM-RS in the The same OCC of at least two DM-RSs of the RS to determine the first OCC; and

signaling the second CS index to the second device, wherein the second device is configured to receive the second CS for transmitting multiple DM-RSs over the multiple layers an index, and determining, based at least in part on a predetermined rule corresponding to the second CS index and the index for each layer of the plurality of layers, a method for transmitting the plurality of DM-RSs The second CS value of each DM-RS and the second OCC.

2. The method of claim 1, wherein the first device and the second device have different transmission bandwidths.

3. An apparatus for providing a cyclic shift (CS) index or an orthogonal cover code (OCC) to a device in multi-user multiple-input multiple-output (MU-MIMO) communication, comprising:

at least one processor; and

a memory coupled to the at least one processor and having instructions executable by the at least one processor to:

determining a first CS index and a first OCC for the first device;

determining a second CS index and a second OCC for a second device, wherein the second device is paired with the first device in MU-MIMO communication;

sending the first CS index to the first device, wherein the first device is configured to receive the first signal for sending multiple demodulation reference signals (DM-RS) on multiple layers A CS index, and determining a method for transmitting each of the plurality of DM-RSs based at least in part on a predetermined rule corresponding to the first CS index and an index for each of the plurality of layers the first CS value and the first OCC of one DM-RS, wherein the first device is configured to the same OCC of the two DM-RSs to determine the first OCC;

as well as

sending the second CS index to the second device, wherein the second device is configured to receive the second CS index for transmitting a plurality of DM-RSs on the plurality of layers, and , determining, based at least in part on a predetermined rule corresponding to the second CS index and the index for each of the plurality of layers, for transmitting each DM of the plurality of DM-RSs - the second CS value of the RS and the second OCC.

4. The apparatus of claim 3, wherein the first device and the second device have different transmission bandwidths.

5. An apparatus for providing a cyclic shift (CS) index or an orthogonal cover code (OCC) to a device in multi-user multiple-input multiple-output (MU-MIMO) communication, comprising:

means for selecting a first CS index for a first device and selecting a second CS index for a second device, wherein the second device is paired with the first device in MU-MIMO communication;

means for selecting a first OCC for the first device and a second OCC for the second device; and

means for signaling the first CS index to the first device and signaling the second CS index to the second device,

wherein the first device is configured to receive the first CS index for transmitting a plurality of demodulation reference signals (DM-RS) on a plurality of layers, and, based at least in part on a correlation with the first CS A predetermined rule corresponding to an index and an index for each of the plurality of layers determine a first CS value and the first OCC for transmitting each of the plurality of DM-RSs , and determining the first OCC by determining the same OCC on at least two layers of the plurality of layers for at least two DM-RSs of the plurality of DM-RSs, and

wherein the second device is configured to receive the second CS index for transmitting a plurality of DM-RSs over the plurality of layers, and based at least in part on the second CS index corresponding to the second CS index A predetermined rule and the index for each of the plurality of layers determine a second CS value and the second OCC for transmitting each of the plurality of DM-RSs.

6. The apparatus of claim 5, wherein the first device and the second device have different transmission bandwidths.